Dupont-mitsui Fluorochemicals Company, Ltd.

E.i. Dupont De Nemours and Company

Dupont Mitsui Fluorochemicals

Dupont-mitsui Flourochemicals Co Ltd

Dupont Mitsui Flurochemicals

Hajime Sato

Jeong Chang Lee

Shosaku Kondo

Noriyuki Suzuki

Pham Hoai Nam

Kasuke Ishii

Kenji Oki

Shousaku Kondo

Perfluoropolymer composites are provided which are obtained by dispersing layered-silicates having properties of swelling or cleaving in dispersion media in perfluoropolymers and having the ratio of the viscosity, V, at 0.1 rad/sec by a parallel plate mode of a dynamic rheometer to the viscosity, V, measured at 1 rad/sec is 1.5 or greater, viscosity being measured at 340&#xb0; C. A method for making the perfluoropolymer composites is provided, and molded articles therefrom. And additionally, perfluoropolymer composites, where layered-silicates having properties of swelling or cleaving in dispersion media are dispersed in perfluoropolymers, with the storage elasticity of 2 times or higher than that of fluoropolymers, at temperatures greater than the glass transition temperature of perfluoropolymers.

Fluoropolymer blends with inorganic layered compounds

The present invention relates to a heat-meltable fluoropolymer composite composition having excellent thermal conductivity, gas and chemical liquid barrier properties and dynamic properties such as storage modulus which comprises a heat-meltable fluoropolymer fine powder and a layered-compound organized by treatment with tetraphenyl phosphonium ions. The present invention also relates to a heat-meltable fluoropolymer composite composition having similar properties to those mentioned above which is obtained by a process (I) in which a heat-meltable fluoropolymer composite composition is obtained by grinding and mixing a heat-meltable fluoropolymer fine powder and a layered-compound and a process (II) in which such heat-meltable fluoropolymer composite composition thus obtained is melted and mixed under shear stress by means of a melt-mixing extruder.

Fluoropolymer composite composition

A method for producing an electrically conducting melt-processible fluoropolymer comprising pulverizing a composition of (a) carbon aggregate and (b) coagulum particles of aqueous dispersion polymerized melt-processible fluoropolymer, coating the coagulum particle with the disintegrated particles of carbon black. The preferred composition comprises a structured carbon black such as acetylene black and a melt processible fluoropolymer wherein said melt processible fluoropolymer has two crystallization peaks in a DSC cooling curve when allowed to crystallize from a temperature of not less than its melting point at a cooling rate of 12&deg; C./min; and the ratio of the crystallization peak heights (high temperature side peak/low temperature side peak) is 0.65 or greater; and/or the ratio of the high temperature side crystallization peak area to the total area of the crystallization peaks &lsqb;high temperature side peak area/(high temperature side peak area&plus;low temperature side peak area)&rsqb; is 0.18 or greater.

Conductive melt-processible fluoropolymer

Blends of 3 to 97 parts by weight of tetrafluoroethylene/hexafluoropropylene copolymer containing 3 to 9 wt % hexafluoropropylene and 0 to 4 wt % of tetrafluoroethylene/perfluoro(ethyl vinyl ether) or tetrafluoroethylene/perfluoro(methyl vinyl ether), with 97 to 3 parts by weight tetrafluoroethylene/perfluoro(ethyl vinyl ether) or tetrafluoroethylene/perfluoro(methyl vinyl ether), which co-crystallize are found to have improved melt strength and improved mechanical properties, and a higher service temperature than the tetrafluoroethylene/hexafluoropropylene copolymer.

Melt processible fluoropolymer composition

A fluoropolymer article containing functionalized fluoropolymer is reinforced with fibrous liquid-crystal polymer.

Melt processible fluoropolymer composites

A melt processible fluoropolymer composition comprising a copolymer of tetrafluoroethylene with a perfluoro(alkyl vinyl ether), which copolymer is a mixture of a first fluorocarbon resin copolymer in which the alkyl group of the perfluoro(alkyl vinyl ether) has at least 3 carbons, and a second fluorocarbon resin copolymer in which the alkyl group of the perfluoro(alkyl vinyl ether) has 1 and/or 2 carbons, and the components of the blend are miscible in the amorphous regions and sometimes in the crystalling regions.

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Shimizu, Japan

Hajime Sato